No abstract

No abstract

Reinforcement-linked or incentive-motivational changes in general activity were studied by classically conditioning thirsty rats with CS+ (US: water) and CS -(US: electric shock), and, in another situation, measuring their activity in the presence and absence of CSs. In Experiment 1, rats were conditioned while held inactive in restrainers; in Experiment 2, the incidence of perambulation, grooming, and sitting was measured; in Experiment 3, drive level was varied. As compared to control conditions, CS+ increased exploratory perambulation and CS-increased motionless sitting. Reduction in drive -decreased perambulation and increased grooming. Incentive-motivational stimuli may induce positive and negative central states which, together with situational cues, determine the form of activity.

No abstract

No abstract